动态条件下十二胺对Q235碳钢CO_2腐蚀的缓蚀行为研究  

CO_2 Corrosion Inhibition of Carbon Steel by Dodecylamine under Flow Conditions

作　　者：刘宏伟[1] 熊福平[1] 吕亚林[1] 葛承宣 刘宏芳[1,2] 胡裕龙[3] LIU Hongwei XIONG Fuping LV Yalin GE Chengxuan LIU Hongfang HU Yulong(Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China Shenzhen Institute of Huazhong University of Science and Technology, Shenzhen 518000, China College of Science, Naval University of Engineering, Wuhan 430033, China)

机构地区：[1]华中科技大学化学与化工学院材料服役与失效湖北省重点实验室,武汉430074 [2]深圳华中科技大学研究院,深圳518000 [3]海军工程大学理学院,武汉430033

出　　处：《中国腐蚀与防护学报》2016年第6期645-651,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(51171067);深圳市基础研发基金项目(JC201005310696A);华中科技大学创新研究院技术创新基金项目(0118013068);华中科技大学创新基金项目(国合专项2015ZZGH010和前沿探索类2015TS150);材料化学与服役失效湖北省重点实验室基金项目(201502)资助

摘　　要：采用电化学方法,系统的研究了动态条件下,3%(质量分数)NaCl腐蚀介质中,十二胺缓蚀剂对Q235碳钢CO_2腐蚀的缓蚀行为。结果表明,静态条件下,十二胺对碳钢CO_2腐蚀具有较好的缓蚀效果,当缓蚀剂浓度为60 mg/L时,缓蚀效率可以达到93.44%。动态条件下,无缓蚀剂的测试介质中,试样的腐蚀速率随着转速的增加而增加。在含有80 mg/L十二胺缓蚀剂测试介质中,试样在转速为500 r/min时的腐蚀速率最大;而在2000 r/min时,试样的腐蚀速率最小,缓蚀剂的加入明显的改变了试样的腐蚀行为。转速为1500 r/min时,试样的腐蚀速率随着缓蚀剂浓度的增加而减少;当缓蚀剂浓度为80 mg/L时,缓蚀效率可以达到87.93%。The corrosion inhibition of dodecylamine on carbon steel in NaC1 solution with continu- ous aeration of CO2 was studied by means of a rotating disk with electrochemical methods. Results show that the inhibition efficiency of dodecylamine can reach 93.44% with the inhibitor dose of 60 mg/L in the solution. In the blank NaC1 solution without inhibitor, the corrosion rate of the steel increases with the increase of the rotation speed. In the solution with the inhibitor dose of 80 mg/L, the corrosion rate of the steel reaches the highest by rotation speed 500 r/min, and then the lowest by 2000 r/min. The corrosion behavior of carbon steel has changed obviously in the presence of in- hibitor. The corrosion rate increases with the increase of inhibitor dose, and the inhibition efficien- cy can reach 87.93% in the presence of inhibitor dose of 80 mg/L by 1500 r/min.

关 键 词：CO2腐蚀 Q235碳钢 缓蚀剂 动态 

分 类 号：TG142.71[一般工业技术—材料科学与工程]